https://bugs.kde.org/show_bug.cgi?id=502004
Bug ID: 502004
Summary: Losing Type-C/DP 4K@160Hz external monitor detection
after reboot on ASUS Zenbook S 14 UX5406SA
Classification: I don't know
Product: kde
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: unassigned-b...@kde.org
Reporter: matrix...@gmail.com
Target Milestone: ---
Created attachment 179740
--> https://bugs.kde.org/attachment.cgi?id=179740&action=edit
External not showing in Display Configuration
I am using ASUS Zenbook S 14 UX5406SA.
While using Type-C to DP cable to connect to an 4K@160Hz external monitor, the
monitor itself could first work normally but in KDE's System Settings - Display
Configuration, the external monitor would not be there as shown in the
attachment. Then usually after the reboot the system would not be able to
detect the external monitor while keeping everything e.g. cable connection as
same. The situation won't happen if I use HDMI to HDMI cable to only output
4K@60Hz or using the Type-C to DP cable to output 4K@160Hz in Windows so I
could make sure the cable is okay.
Here is the graphic-part output of `inxi -Fazy`.
```
Graphics:
Device-1: Intel Lunar Lake [Intel Arc Graphics 130V / 140V] vendor: ASUSTeK
driver: xe v: kernel arch: Xe2 process: TSMC n3 (3nm) built: 2024+ ports:
active: DP-1 off: eDP-1 empty: DP-2,HDMI-A-1 bus-ID: 00:02.0
chip-ID: 8086:64a0 class-ID: 0300
Device-2: Shinetech ASUS FHD webcam driver: hid-sensor-hub,usbhid,uvcvideo
type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 3-5:4
chip-ID: 3277:0059 class-ID: fe01 serial: <filter>
Display: wayland server: X.org v: 1.21.1.16 with: Xwayland v: 24.1.6
compositor: kwin_wayland driver: X: loaded: modesetting
alternate: fbdev,intel,vesa dri: iris gpu: xe display-ID: 0
Monitor-1: DP-1 model: Philips 27M2N5810 serial: <filter> built: 2024 res:
mode: 3840x2160 hz: 160 scale: 200% (2) to: 1920x1080 dpi: 163 gamma: 1.2
size: 597x336mm (23.5x13.23") diag: 685mm (27") ratio: 16:9 modes:
max: 3840x2160 min: 720x400
Monitor-2: eDP-1 model: Samsung 0x419d built: 2022 res: 2880x1800 dpi: 242
gamma: 1.2 size: 302x189mm (11.89x7.44") diag: 356mm (14") ratio: 16:10
modes: 2880x1800
API: EGL v: 1.5 hw: drv: intel iris platforms: device: 0 drv: iris
device: 1 drv: swrast gbm: drv: iris surfaceless: drv: iris wayland:
drv: iris x11: drv: iris
API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 25.0.2-arch1.2
glx-v: 1.4 direct-render: yes renderer: Mesa Intel Graphics (LNL)
device-ID: 8086:64a0 memory: 15.05 GiB unified: yes display-ID: :1.0
API: Vulkan v: 1.4.309 layers: 4 device: 0 type: integrated-gpu
name: Intel Graphics (LNL) driver: N/A device-ID: 8086:64a0
surfaces: xcb,xlib,wayland
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor wl: wayland-info
x11: xdpyinfo, xprop, xrandr
```
SOFTWARE/OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.13.7-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ Ultra 7 258V
Memory: 30.8 GiB of RAM
Graphics Processor: Intel® Graphics
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